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Diffstat (limited to 'deps/libchdr/include/libchdr/bitstream.h')
| -rw-r--r-- | deps/libchdr/include/libchdr/bitstream.h | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/deps/libchdr/include/libchdr/bitstream.h b/deps/libchdr/include/libchdr/bitstream.h new file mode 100644 index 0000000..d376373 --- /dev/null +++ b/deps/libchdr/include/libchdr/bitstream.h @@ -0,0 +1,43 @@ +/* license:BSD-3-Clause + * copyright-holders:Aaron Giles +*************************************************************************** + + bitstream.h + + Helper classes for reading/writing at the bit level. + +***************************************************************************/ + +#pragma once + +#ifndef __BITSTREAM_H__ +#define __BITSTREAM_H__ + +#include <stdint.h> + +/*************************************************************************** + * TYPE DEFINITIONS + *************************************************************************** + */ + +/* helper class for reading from a bit buffer */ +struct bitstream +{ + uint32_t buffer; /* current bit accumulator */ + int bits; /* number of bits in the accumulator */ + const uint8_t * read; /* read pointer */ + uint32_t doffset; /* byte offset within the data */ + uint32_t dlength; /* length of the data */ +}; + +struct bitstream* create_bitstream(const void *src, uint32_t srclength); +int bitstream_overflow(struct bitstream* bitstream); +uint32_t bitstream_read_offset(struct bitstream* bitstream); + +uint32_t bitstream_read(struct bitstream* bitstream, int numbits); +uint32_t bitstream_peek(struct bitstream* bitstream, int numbits); +void bitstream_remove(struct bitstream* bitstream, int numbits); +uint32_t bitstream_flush(struct bitstream* bitstream); + + +#endif |